गुणोत्तर श्रेणी \(8,16,32,64,\ldots\) के पहले (8) पदों का योग क्या है?
What is the sum of the first (8) terms of the geometric progression \(8,16,32,64,\ldots\)?
Explanation opens after your attempt
C. (2040)
Concept
(S_8=8\(2^8-1\)=2040). In exams, calculate \(2^n\) quickly when the ratio is (2).
Why this answer is correct
The correct answer is C. (2040). (S_8=8\(2^8-1\)=2040). In exams, calculate \(2^n\) quickly when the ratio is (2).
Exam Tip
(S_8=8\(2^8-1\)=2040) है। परीक्षा में अनुपात (2) हो तो \(2^n\) जल्दी निकालें।
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